Dr. Gorbee Logan has given the drug, lamivudine, to 15 Ebola patients, and all but two survived. That's about a 13% mortality rate. Logan said he got the idea to try lamivudine when he read in scientific journals that HIV and Ebola replicate inside the body in much the same way. "Ebola is a brainchild of HIV," he said. "It's a destructive strain of HIV." At first he tried a drug called acyclovir, which is often given to HIV patients to treat infections that occur with their weakened immune systems. But it didn't seem to be effective. Then he tried...